10/9/20151 Unreal Basics CIS 488/588 Bruce R. Maxim UM-Dearborn

10/9/20152 Resources Unreal Development Kit The Buzz3D website UDK Game Development ons/index.asp?isbn= Unreal Developer Network website

10/9/20153 UDK Engine UDK is an open source version of the open-ended Unreal3 system that can be used for many real-time projects Unreal is good for games, but has also been used for industrial visualization (e.g. interactive architectural flythrough)

10/9/20154 Unreal Components Graphics Engine Sound Engine Physics Engine (Karma) Input Manager Network Infrastructure (client/server) Kismet Visual Programing UnrealScript Inteprerter –UnrealScript is object oriented with a syntax similar to C++

10/9/20155 Unreal Component Interaction Engine Core Graphics Engine Sound Engine Physics Engine UnrealScript Interpreter

10/9/20156 Unreal Game Loop Initialization Game Loop Start Check for Input Event Control Update Fire Gun Play Sound Move Player … Events

10/9/20157 Unreal Process - 1 Game Initialization (starting UDK) –Core engine initializes all system components –Components begin to send info back to core for synchronization –Game ready for user input Game Launch (starting a level) –Map is loaded with all its game assets and properties –Each asset’s info sent to Unreal component

10/9/20158 Unreal Process - 2 Gameplay (artistic use of items) –Each component sends events and tasks to the message queue –Unreal game loop runs with highest priority message tasks performed first

10/9/20159 Game Assets - 1 Stored in packages (libraries). Each package type is stored in its own folder. Textures packages (.utx) –Textures used to color object surfaces come from tools like Photoshop or Upaint, could come from digital photographs or scanner

10/9/ Game Assets - 2 Sound packages –Unreal supports.wav files often created using programs like SoundForge, used for sound effects Music Packages –Unreal supports.ogg files create by programs like Cakewalk

10/9/ Game Assets - 3 Static mesh (.upk) –Highly optimized polygonal models from an external 3D package like Maya or 3ds max (you need the right plug-in to import them into Unreal), used for physical details, best to use multiple copies rather than different meshes (for performance)

10/9/ Game Assets - 4 Animation package (.upk) –Store all animated assets (i.e. characters, vehicles, weapons), each elements has two component (texture model and animations) to allow mixing and reuse, created using Maya

10/9/ Game Assets - 5 Map (.upk) –Not a package, a map is a collection of assets used to define a complete game level, created using UnrealEd UCC –Unreal execution environment is a command-line program that allows low- level package editing and compilation of Unreal Script programs (.u)